Donnan, Marissa
Current rating: 1463
Record: 1-3
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 167 | Halliday, Brandon (1500) | Won 2-0 | +181518 |
| 2modern | 111 | Hernandez, Rogelio (1531) | Lost 0-2 | -181500 |
| 3modern | 296 | Vi, Henry (1416) | Lost 0-0 | -191481 |
| 4modern | 516 | Letts, Nicholas (1482) | Lost 1-2 | -181463 |
| average opponent: 1482record: 1-3 | new rating: 1463 | |||